Mercurial > molko
view libmlk-core/core/sys.c @ 313:dbfe05b88627
cmake: bring back for good
It's just too complicated to get portability done right using pure GNU make and
since we're targeting more OSes than Linux we have to incorporate some
portability bits.
author | David Demelier <markand@malikania.fr> |
---|---|
date | Wed, 22 Sep 2021 07:19:32 +0200 |
parents | 0858e33a762d |
children | d01e83210ca2 |
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/* * sys.c -- system routines * * Copyright (c) 2020 David Demelier <markand@malikania.fr> * * Permission to use, copy, modify, and/or distribute this software for any * purpose with or without fee is hereby granted, provided that the above * copyright notice and this permission notice appear in all copies. * * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. */ #include "config.h" #include <assert.h> #include <stdio.h> #include <stdlib.h> #include <limits.h> #if defined(_WIN32) # include <shlwapi.h> # include <windows.h> #else # include <sys/stat.h> # include <errno.h> # include <string.h> #endif #include <SDL.h> #include <SDL_image.h> #include <SDL_mixer.h> #include <SDL_ttf.h> #include "error.h" #include "port.h" #include "sound.h" #include "sys.h" static struct { char organization[128]; char name[128]; } info = { .organization = "fr.malikania", .name = "molko" }; static const char *paths[] = { [SYS_DIR_BIN] = MLK_BINDIR, [SYS_DIR_DATA] = MLK_DATADIR, [SYS_DIR_LOCALE] = MLK_LOCALEDIR }; static inline char * normalize(char *str) { for (char *p = str; *p; ++p) if (*p == '\\') *p = '/'; return str; } static inline const char * absolute(const char *which) { static char path[PATH_MAX]; strlcpy(path, which, sizeof (path)); return normalize(path); } static const char * system_directory(enum sys_dir kind) { static char path[PATH_MAX]; static char ret[PATH_MAX]; char *base, *binsect; if ((base = getenv("MLK_ROOT"))) { snprintf(ret, sizeof (ret), "%s/%s/%s", base, MLK_PREFIX, paths[kind]); } else { /* * Some system does not provide support (shame on you OpenBSD) * to the executable path. In that case we use PREFIX+<dir> * instead. */ if (!(base = SDL_GetBasePath())) snprintf(ret, sizeof (ret), "%s/%s", MLK_PREFIX, paths[kind]); else { /* * Decompose the path to the given special directory by * computing relative directory to it from where the * binary is located. * * Example: * * PREFIX/bin/mlk * PREFIX/share/mlk-adventure * * The path to the data is ../share/molko starting from * the binary. * * Put the base path into the path and remove the value * of MLK_BINDIR. * * Example: * from: /usr/local/bin * to: /usr/local */ strlcpy(path, base, sizeof (path)); SDL_free(base); if ((binsect = strstr(path, paths[SYS_DIR_BIN]))) *binsect = '\0'; snprintf(ret, sizeof (ret), "%s%s", path, paths[kind]); } } return normalize(ret); } static const char * user_directory(enum sys_dir kind) { /* Kept for future use. */ (void)kind; static char path[PATH_MAX]; char *pref; if ((pref = SDL_GetPrefPath(info.organization, info.name))) { strlcpy(path, pref, sizeof (path)); SDL_free(pref); } else strlcpy(path, "./", sizeof (path)); return path; } static inline int mkpath(const char *path) { #ifdef _WIN32 /* TODO: add error using the convenient FormatMessage function. */ if (!CreateDirectoryA(path, NULL) && GetLastError() != ERROR_ALREADY_EXISTS) return errorf("unable to create directory: %s", path); #else if (mkdir(path, 0755) < 0 && errno != EEXIST) return errorf("%s", strerror(errno)); #endif return 0; } int sys_init(const char *organization, const char *name) { #if defined(__MINGW64__) /* On MinGW buffering leads to painful debugging. */ setbuf(stderr, NULL); setbuf(stdout, NULL); #endif strlcpy(info.organization, organization, sizeof (info.organization)); strlcpy(info.name, name, sizeof (info.name)); if (SDL_Init(SDL_INIT_VIDEO | SDL_INIT_AUDIO) < 0) return errorf("%s", SDL_GetError()); if (IMG_Init(IMG_INIT_PNG) != IMG_INIT_PNG) return errorf("%s", SDL_GetError()); if (TTF_Init() < 0) return errorf("%s", SDL_GetError()); if (Mix_Init(MIX_INIT_OGG) != MIX_INIT_OGG) return errorf("%s", SDL_GetError()); if (Mix_OpenAudio(44100, MIX_DEFAULT_FORMAT, 2, 4096) < 0) return errorf("%s", SDL_GetError()); Mix_AllocateChannels(SOUND_CHANNELS_MAX); return 0; } const char * sys_dir(enum sys_dir kind) { switch (kind) { case SYS_DIR_BIN: case SYS_DIR_DATA: case SYS_DIR_LOCALE: return system_directory(kind); default: return user_directory(kind); } } int sys_mkdir(const char *directory) { char path[PATH_MAX], *p; /* Copy the directory to normalize and iterate over '/'. */ strlcpy(path, directory, sizeof (path)); normalize(path); #if defined(_WIN32) /* Remove drive letter that we don't need. */ if ((p = strchr(path, ':'))) ++p; else p = path; #else p = path; #endif for (p = p + 1; *p; ++p) { if (*p == '/') { *p = 0; if (mkpath(path) < 0) return -1; *p = '/'; } } return mkpath(path); } void sys_finish(void) { Mix_Quit(); TTF_Quit(); IMG_Quit(); SDL_Quit(); }